The papers of the ALA (Agencia Latinoamericana) are divided in 3 major categories: the articles written by the contributors to the ALA (collected during almost 40 years), their correspondence, and the newspaper clippings of those articles.

The writers are mainly from Latin American countries and Spain, but with a few American and British writers also included, such as Waldo Frank and Hugh Thomas. The articles provide information on literature, journalism, sociology, economics and political history of the major powers of the world of that period, and in many cases relating to the Latin American countries.

The bulk of the collection is comprised of contributions from Víctor Alba, Marco A. Almazán, Luis Araquistain, Paul Andrade, Germán Arciniegas, Carlos Alberto Montaner, Ramón Gómez de la Serna, Julian Marias, Cristina Martin, Alberto Luis Sanchez, Salvador de Madariaga, Ramón Sender and Arturo Uslar Pietri. There are also articles by other distinguished authors, such as Miguel Angel Asturias, Alberto Baeza Flores, Alejandro Casona, Pablo Neruda and Alfonso Reyes.

Included among the ALA papers are articles written by Joaquín Maurín, who used the pen names of W.K. Mayo and Félix R. Anderson. He also wrote under the pen names of John Andersen and Julio A. Roy, but these articles ore not included in this collection. When signing correspondence, he used his own name, Joaquín Maurín, as well as J.M. Juliá and Ray Campbell. Joaquín Maurín's son, Mario, wrote some articles under the same pen name as his father, John Andersen.

The Dolores Martí de Cid Collection contains numerous works on Latin American theater and literature. The collection is arranged in four series.

The collection consists of documents, books and other materials written and collected by Cuban writer Gastón Baquero (1914-1997) during the last years of his life in Madrid, Spain. The collection includes correspondence, published and unpublished works by Baquero, clippings of newspaper articles by and about Baquero, research notes, photographs, clippings, scrapbooks, awards and memorabilia. Although the collection includes personal papers and documents, the bulk of materials relates to the subjects that occupied Baquero throughout his life, namely Cuban, Spanish and Latin American literature, history and politics.